Clifton argued that physicians should base their judgments about the effects of treatments on a sufficient number of their own observations, or trusted observations by other physicians, rather than on the correlation of treatments with established theory. He recommended that the clinical data should be organized in tables.  Digital facsimile from Google Books at this link.

Instead of assessing the efficacy of therapies by their correlation with theories, Clifton argued that physicians should base their judgments about the effects of treatments on a sufficient number of their own observations, or observations by other physicians that they trusted. This data he organized in tables. Digital facsimile from Google Books at this link.